Earthquake shut-off valve for gas line

Details Earthquake shut-off valve for gas line Earthquake shut-off valve for gas line

1981-05-15

1982-05-25

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

By pendulum or swinging member

137 38, F16K 1736

Patent

active

043311717

ABSTRACT:
Earthquake tremors dislodge a pedestal-mounted ball which then blocks the outlet passage of a casing installed in a gas line. To make the device more sensitive, the pedestal is spring-supported in the casing. Further, several balls may be suspended from wires in such position that, when they sway because of tremor, they knock the shut-off ball from the pedestal. The ball may be knocked from the pedestal in an emergency by kicking or rapping it. Additionally, the pedestal may be mounted on horizontal ball bearings with an adjustable compressive force which makes the shut-off ball especially sensitive both to vertical and horizontal tremors. In a severe emergency, such as an earthquake, the device saves lives and property by minimizing potential leakage and explosion from ruptured pipes.

REFERENCES:
patent: 2585316 (1952-02-01), Hobson
patent: 2927592 (1960-03-01), Ferre
patent: 3747616 (1973-07-01), Lloyd
patent: 3768497 (1973-10-01), Mueller
patent: 4165758 (1979-08-01), Douce

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